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Zyxel GePON OLT-1308S-22 8-port Optical Line Termination

Broadband Passive Optical Network

ZyXEL’s OLT-1308S-22 GEPON system (Optical Line Termination, OLT) is located in the operator’s central office and different types of ONU (Optical Network Unit, ONU) are located at customer premises for FTTB/H connections. The OLT-1308S-22 is connected by a single fiber to an optical power splitter that supplies the optical signal to as many as 256 sets of ONUs (each OLT PON port supports up to 32 ONU sets). The OLT-1308S-22 is a mini chassis with a Layer-2 GEPON switch featuring 8 GEPON ports (including 3 PON modules), 4 Gigabit uplink ports (2 copper and 2 combo ports) and one 10/100 Mbps Ethernet port for out-of-band management. For CPE compatibility, ZyXEL provides several models for different network architecture needs.

High Bandwidth

As demand for broadband services such as high-definition TV (HDTV), media-on-demand (MoD), voice over IP (VoIP) and online gaming increases continuously, GEPON technology emerges to provide astounding 1.25 Gbps bandwidth for both upstream and downstream, giving a 30 Mbps bi-directional bandwidth to up to 32 subscribers each. It is a cost-effective access technology with a reliable and scalable carrier-grade Ethernet infrastructure that really addresses Triply-play service needs.

Cost-Effective Operations beyond Initial Fiber Deployment

Construction of the fiber access network is the most labor-intensive task in FTTX projects and thus the most expensive. However, PON architecture requires less cost since it requires less fiber. PON networks use splitters to allow minimal fiber deployment in local loops. In addition, it requires no power between CO and network’s termination that lead to lowered maintenance costs.

20 km Long Distance Coverage

On a PON network, subscribers must be within 10 to 20 km from the CO, depending on the total number of splits (distance decreases as splits increase). The OLT-1308S-22 supports a maximum distance of up to 20 km, and users can choose the different distances ONU type for 10 km or 20 km deployment to adapt to the existing network structure.

High Scalability and Flexibility for Easy Installation and Maintenance

Since ONU can be added to or removed from the network architecture easily and economically, its great flexibility is perfect for the deployment of different network architectures. FTTH deploys ONU in residences, while FTTN/FTTC is the combination of fiber and existing copper infrastructure. In addition, administrators can upgrade firmware, test loopbacks and detect failures remotely.

System Specifications / Standard Compliance

IEEE 802.3ah
IEEE 802.3 Ethernet
IEEE 802.3u Fast Ethernet
IEEE 802.3z Gigabit Ethernet
IEEE 802.3x flow control
IEEE 802.3ad LACP aggregation
IEEE 802.1d spanning tree protocol
IEEE 802.1w rapid spanning tree protocol
IEEE 802.1Q VLAN tagging
IEEE 802.1p QoS
IEEE 802.1x port authentication
IEEE 802.11 MIB

MAC and Packet Buffer

16K MAC entries

Traffic Management and QoS

IEEE 802.1p QoS with 8 priority queues per port
IEEE 802.1Q tag-based VLAN
2K static VLAN, up to 4K dynamic VLAN
VLAN trunking
Supports to GVRP, automatic VLAN member registration
IGMP v1, v2 & v3

User Security and Authentication

MAC filtering per port, secure access to each port
Specific MAC forwarding per port: only specified MAC addresses can access the network (per lock)
Limits to the number of MAC address per port
802.1x port-based security that prevent unauthorized client access to the network
Private VLAN provides security and isolation between ports on a switch that prevent users to snoop on each others’ traffic
VLAN stacking provides CVLAN and SVLAN to help separate different user traffic for security concern and also enable the flexible VLAN usage for users

Network Administration Security

User name/password required for web/Telnet/local console administrators
Two-level security by specific SNMP read/write community
SSH provides network security by encryption administration traffic

Network Management

Web-based management
Telnet CLI
SNMP v1, v2c & v3
RS-232 local console
Out of band management
NetAtlas EPON manager

Remote ONU Management through OAM Channel

Firmware upgrade
Configuration/provisioning
Status/alarm report
Loop-back tests

Hardware Specifications

2 GEPON PON ports imbedded
3 open GEPON modules, each module supports 2 PON ports
Wavelength: 1.31 um for upstream and 1.49 um for downstream
Distance: 1000Base-PX20 for distances up to 20 km
4 GE uplinks with 2-port RJ-45 1000Base-T and 2 combo ports
1 10/100Base-T for out-band management
1 DB9 RS-232 for craft interface
1 alarm input port
Power input:
- AC: 100 V ~ 240 V
- DC: -48 V
Power consumption:
- AC: 90 Watt max
- DC: 80 Watt max

Physical Specifications

Item weight: 4,500 g (9.94 lb)
Item dimensions: 440 (W) x 312 (D) x 44 (H) mm (17.32 (W) x 12.28 (D) x 1.73 (H) inch)
Packing weight: 6,000 g (13.26 lb)
Packing dimensions: 574 (W) x 460 (D) x 161 (H) mm (22.59 (W) x 18.11 (D) x 6.34 (H) inch)